National Defense: Jarman's Junglemen

On Gatun Lake, in the Panama Canal Zone, floats a little fleet of
motorboats.
They are blue-grey, stubby, oldso old, some of them, that they are
kept lake-worthy mainly by the heroic ingenuity of their soldier crews.
The soldiers who run the boats call them the third-ocean fleet.
They are the supply boats of one of the finest, least-known outfits in
the U.S.
Army: the Panama Coast Artillery Command.

Each day, from docks along the lakeside, the stubby boats chutter off
with men and supplies for the listening posts, anti-aircraft gun
batteries, searchlight positions which stud the green, hot hills around
the...